Bryant 280ANV Install on a Solid, Level Mounting Pad, Clearance Requirements, Operating Ambient

Step 2 — Install on a Solid, Level Mounting Pad

If conditions or local codes require the unit be attached to pad, tie down bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern in Fig. 3 to determine base pan size and knockout hole location.

For hurricane tie downs, contact distributor for details and PE (Professional Engineer) Certification, if required.

On rooftop applications, mount on level platform or frame. Place unit above a load-bearing wall and isolate unit and tubing set from structure. Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require wind baffles. Consult the Service Manual - Residential Split System Air Conditioners and Heat Pumps Using Puron→ Refrigerant for wind baffle construction.

NOTE: Unit must be level to within ±2° (±3/8 in./ft,±9.5 mm/m.) per compressor manufacturer specifications.

Step 3 — Clearance Requirements

When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm) clearance to service end of unit and 48 in. (1219.2 mm) (above unit. For proper airflow, a 6-in. (152.4 mm) clearance on 1 side of unit and 12-in. (304.8 mm) on all remaining sides must be maintained. Maintain a distance of 24 in. (609.6 mm) between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

On rooftop applications, locate unit at least 6 in. (152.4 mm) above roof surface.

3/8---in. (9.53 mm) Dia. Tiedown Knockouts in Basepan(2) Places

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Do not allow water and/or ice to build up in base pan.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Locate the unit in such a way that it is stable in all circumstances including adverse weather conditions.

Step 6 — In Long-Line Applications, Install Liquid-Line Solenoid Valve (LSV)

For refrigerant piping arrangements with equivalent lengths of greater than 80 ft. (24.38 m) and/or when elevation difference between indoor and outdoor unit is greater than ±20 ft. (±6.10 m), follow the piping configuration and liquid line solenoid valve (LSV) accessory requirements from the Residential Piping and Long-line guideline. CCH, start gear and piston changes do not apply. If required by Long-Line Guideline, install LSV kit, part no. KHALS0401LLS, specifically designed for Puron→ refrigerant heat pumps. LSV should be installed within 2 ft. (0.61 m) of outdoor unit with flow arrow pointing toward outdoor unit.

Make the necessary electrical connections as shown on Fig. 21 and by following the Installation Instructions included with accessory kit.

IMPORTANT: Flow arrow must point toward outdoor unit.

A05177

UNIT BASE PAN TIEDOWN KNOCKOUT LOCATIONS in. (mm)

User Interface		Furnace or
		Fan Coil
A	Green	A
B	Yellow	B
			ABCD
C	White	C	Connection (optional)
D	Red	D

Variable

Speed

HP

A

B

C

No

Use

Dimension in. (mm)	A	B	C
35 X 35	9–1/8 (231.8)	6–9/16 (166.7)	28–7/16 (722.3)
(889 X 889)

Fig. 3 - Tiedown Knockout Locations

S1

S2

Optional Remote Room Sensor

LLS

C

LS

Step 4 — Operating Ambient

The minimum outdoor operating ambient in cooling mode is 55_F (12.78_C) without low ambient cooling enabled, and the maximum outdoor operating ambient in cooling mode is 125_F (51.67_C). The maximum heating operation ambient is 66_F (18.9_C). Compressor protections prevent operation below -10 to -20_F.

Step 5 — Elevate Unit

Elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit.

A12053

Fig. 4 - Liquid Line Solenoid Electrical Connection

(Required for long line applications)

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